Vocabulary consisting only from characters you are able to read
よじ上る
yojinoboru
to climb, to clamber (over, up), to scramble (up), to scale, to claw one's way upgodan, verb, vintrans
勉める
tsutomeru
to endeavor (endeavour), to try, to strive, to make an effort, to exert oneself, to be diligentichidan, verb, vtrans
戦う
tatakau
to fight/to battle/to combat/to struggle against/to wage war/to engage in contest/(P)godan, sensou, verb, vintrans
耳にする
miminisuru
to hear, to hear by chance, to hear by accident, to catch (the sound)suru
助ける
tasukeru
to help/to save/to rescue/to give relief to/to spare (life)/to reinforce/to promote/to abet/(P)ichidan, jlpt3, verb, vtrans